It always to challenge to keep the fridge free of strange odors while not in use. I have been using charcoal bags with great results. After fridge use I just wipe the inside as normal drop in a bag and shut it. After sitting you will get no strange odor once opened and put back into use. To refresh the charcoal bag just set in the sun.
After several months and testing on two fridges Im sold and wanted to share with others.